Motorcycle Repair/1999 Kawasaki Vulcan 1500 problem
Turned key on my 1999 Kawasaki Vulcan 1500 today and the starter relay behind the radiator tank on the right made a click for 1 second before all power was lost (all lights out). Checked battery first, fine. Checked all fuses fine. Tried starting bike and starter relay clicked for 1 second and again all power was lost. I waited 1 minute and it started with no problem.
While accelerating, it occasionally backfires and seems to loose power for a second then comes back. Idles fine. Any ideas
There are quite a few circuits that could cause problems but
most likely either a faulty ignition switch or a junction box
internal relay is bad.
Also check for loose battery ground to the frame or poor connections on the
battery and starter solenoid relay.
The junction box has a few internal relays but the unit is not
serviceable, it must be replaced. Some of it might be possible
to bypass with the help of a wiring diagram and some
Here is the wiring for the starter circuits and junction box,
it might help you find the break in the power if you
have a multimeter or test light.
It can be tough to find intermittant faults but if you
notice anything else you can let me know.